That heat shrink is a neat idea, be interesting to see how it holds up over time.
I was surprised and pleased to see how my Mag filter captured some very fine metal particles that was the consistency of sludge and easily wiped out of the filter housing with a rag during my oil change.
Getting these fine abrasive particles out of the oil should do good things to the longevity of the engine and especially the bearings.
Like you I could only use seven magnets as the pull is so strong it would be near impossible to position them before securing them down.
I simply used a stainless steel pipe clamp around the housing and semi tightened it and pushed each magnet into place under the clamp before doing the final tightening. Worked like a charm.
Magnetic Sludge visible at each magnet position. The particles are so fine they pass through the filter element.
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"It broke because it wants to be Upgraded
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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)